Smearfish, on rare occasion, comes close to the surface of port towns to doodle on old piers with the water-resistant fluid that leaks from its tail. Its body is poisonous and has sharp barbs, causing most potential predators to ignore it.
A Smearfish uses the pressure of water it swallows to shoot toxic quills all at once from all over its body. A Smearfish marks its territory using a fluid that leaks out from the tip of its tail.